CONTENTS. Vli 



Page 



THE SKIN OR RIND OF PLANTS . . .76 



Like the scarf skin of animals . ib. 



Stretches as the plant grows . . '77 



Opinions respecting its origin . . . ib. 



The Pores of the Rind . . . 79 



Remarks of Rudolphi and M. A. Richard . 80 



Opinions of Link and R. Brown . . .81 



Air Cells . . . . . . ib. 



Similar to the spiracles of insects . . ib. 



Experiments of Dutrochet . . . ib. 



The Coloured Rind . . . . .82 



Lies immediately under the outer rind . . . ib. 



THE INNER BARK . . . . . ib. 



Composed of two layers . . . . ib. 



The pulp bark . ... 83 



Terms applied to the Rind . . 84 



Varieties in aspect and surface . . . ib. 



THE WOOD OF PLANTS . . . ib. 



Composed of fibrous tissue and silver grain . . 85 



Annual layers or rings , . . ib. 



THE PITH^OF PLANTS .... ib. 



The pith tube . ib. 



ORGANS AND FUNCTIONS OF PLANTS . . 86 



This department neglected by Botanists . ib. 

 A leading branch of Botany .... ib. 



ORGANS OF DIGESTION . . . ib. 



Plants have no locomotion .... ib. 



Must find their food where they grow . . . ib. 



Food of Plants . . . . . ib. 



Plants can only take liquid food . . 87 



Water only the vehicle, not the real food . ib. 



Proofs from hyacinths . . ib. 



Proofs from experiments with distilled water . ib. 



Proofs from chemical analysis . . . ib. 



Lassaigne's experiment . . . ib. 



Subject still imperfectly understood . 88 

 The Spongelets or Suckers .... ib. 



Suckers of plants differ from those of insects . . ib. 



Will not admit fluids thicker than water . ib. 



Plants famished in the midst of plenty . ib. 



Experiment of Sir H. Davy . . 89 



Suckers of leaves . ib. 



Experiments of Bonnet and Du Hamel . ib. 



Propagation by cuttings . ib. 



Experiments of Hales - 90 



The alleged course of the sap . ib. 



Rain and river water preferable to spring water . ib. 



Principles of manuring . . . 91 



Abortive proposal of Kretschmar and Tull . ib. 



